Malicious PDF — malware analysis report

Static analysis result for SHA-256 c900728958d4cd5c…

MALICIOUS

PDF

34.9 KB Authoring application: LibreOffice Draw
MD5: a21c0f56d5f03b26fc72d7b0378fc155 SHA-1: a25cded1c482a1d585e15d406bb0b453ef95b1d8 SHA-256: c900728958d4cd5c591a3fa1ef1307863e95fcbb5ac05d2d12e2a50a457e4c16
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to other PDF files. This suggests a phishing or SEO manipulation campaign. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a phishing intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.booztees.com/uploads/1/3/0/8/130813827/xaxowip_zojomuz_modirawoximab.pdf
    • http://datacenter.nttrdc.com/uploads/1/3/0/5/130590714/gopupovali.pdf
    • http://alecroche.com/uploads/1/3/0/6/130640209/tewivo.pdf
    • http://www.mexicanwolffund.org/uploads/1/3/0/7/130739536/lexefovagovarir_tobinagukowijos_faruwenaniwuneb_sinodafufabaxox.pdf
    • http://carriageclassic.org/uploads/1/3/0/6/130604056/058aa.pdf
    • http://parklandrestorativejustice.ca/uploads/1/3/0/6/130640116/ruzidam_logezalutiru_tuwatab.pdf
    • http://dreaminkpub.com/uploads/1/3/0/3/130313090/d6e493c8da4.pdf
    • http://mingalarfoods.com/uploads/1/3/0/7/130740504/a7b26dde.pdf
    • http://dentalseosuccess.com/uploads/1/3/0/5/130539660/lijegikulegopik-mumazuduvi-kumegekot.pdf
    • http://www.creategoodliving.com/uploads/1/3/0/5/130589191/gazemiji_zuweriduti.pdf
    • http://lebaijiaguojiyule.br3h.com/uploads/1/3/0/6/130605433/130605433.html#35th+asean+summit+2019+venue

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033c4.bin
2010ff72e6c95877aed264395ffae264998550edc11ff1c2de3726dd7f5da757		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33C4 7280 bytes

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